I agree with bluestar on this, Karen. I've said similar -- you can stand firm against your H, defend your interests and still remain our lovable, kind-hearted Karen: our sunshine lady with the chocolate chip cookies and the V-S top.
Seriously, you need to do this for yourself and you need to do this for your children. I'd stay on your L until she files for a temp. custody hearing. Your H is not to be trusted. While I know you would prefer to keep the peace and I agree it's best to let sleeping dogs lie, this particular dog is not really sleeping, now is he? No, he's always running around causing mayhem.
Ya' gotta' keep after 'em, girl. We're behind you.